Scaffold hanger



Jan. 10, 1.925. 5 1,655,562

- M. POWERS SCAFEOLD HANGER Filed Dec 51, 1925 3 Sheets-Sheet 1 I In venio: JIa'oizaei Fowei s,

Ian. 10, 19 28.

. M. POWERS SOAFFOLD HANGER Filed Dec. 31. 1926 3 Sheets-Sheet 2 Ina/eater) Michael Powers,

y 5 flit s.

Jan. 10,1928.

M. POWERS SCAFFOLD HANGER Filed Dec. 31. 1926 3 Sheets-Sheet 6 a I I Inveniov.

Mi haeZ Powers, MfiQ Patented Jan. 10, 1928,

1 UNITED 'STATESPATENT OFFICE.

MliCHAEL POWERS, F BOSTON, MASSACHUSETTS.

SCAFIEOLD EANGER.

- Application filed December 31', 1926. Serial No. 158,230.

Thisinvention relates to movable scaffolds and one object of the invention is to pro- Fig. 2, an end elevation of two hangers beam: as desired, by mechanism to be decribed.

Each shaft 1 also carries, preferably at one end, a supplemental floor adjusting pulley 13 which may be separate from the pulley 9 or' obviously the pulley 9 may be provided with a second groove to take the place of the pulley 13, for carrying. a cable 14 while its upper end issecured to the pulley ecured to the floorbars 4: at its lower end,

13, for providing a'supplemental raising and. lowering adjustment of the bars 4 and their platform planks 5, as will be more specifical- 15 and the scaffold floor and roof positioned for use, partly broken. away;

Fig. 3, a vertical detail from the right, partly in section, on the line 3-3, Fig. 1,"

the gears being shown in elevation;

Fig. 4,-a vertical detail partly in section on the lined- 1, Fig. 1; and

Fig. 5, a side elevation of two of the scaffold hangers, in tandem arrangement with a modified form of; supplementary .fioor adjusting means, the roofs and floors shown in section. V I t i Referring first to Fig. 1, my novel scaffold hanger comprises tworaising and lowering units or devices which may be referred to individually as a, b, substantially identical in construction, so that a detaileddescription of one of them willbe suflicient- Each'device comprises, preferably, Figs.

1, 2, a shaftl carrying at its outer end a hearing member 2 therefor, which may be circular, from which depends a permanent 'rlioor support as a cable 3, stationary thereon and secured at its lower endto one or more, herein two, floor supporting bars 4, asback 40 to back positioned angle irons, which irons carry the planks 5 of the scafiold.

Each shaft 1, Figs. 1, 2, also carriesznefar its outer end aroof and railsupporting plate or other suitable memberG, which supports *abar 7.as a- U-bar,-the ends ofi which, Fig. 2, may be conveniently turned uptohold in position; the planks 8 forming the roof. Each shaft 1 also carries, preferably near "its end, the pulleyordrum- 9, on 'which is wound one end ofa supporting. cable 11, the

opposite end of which is secured to the outwrigger12 or other suitable support which may be an I beam extendedoutwardly from the buildinglO, the cable 11 being used [35 to 'raiseor lower the scafiold to; and from the vly described.

For operating the shaftl, Fig. 1, to raise or lower the scaffold as a whole, each shaft is connected to a, preferably, common gear 16 in mesh with a pinion 17 iournaled in a frame like member 18 carried by. the shaft 1. This member 18, Figs. 1, 2, 3, alsocarries opposed tie bars 19 in which is journaled the worm 20 also in mesh with. the pinion 17 the worm be ng operated, Fig. 3,

by the handle 21which maybe removable and for use on either end ofthe worm shaft.

The frame 18, Fig.1, is positionedbetween" and secured to the .U-shaped anchoring bracket .22, thereby stabilizing the, frame and its gears, and preventing any movement of the frame relative to the shaft 1.

j One other additional. form of. control is I.

here shown in Fig. .1, and also in 4, in dotted lines, where a handle 23 forked at one.

pivoted pawl 25 maybe used in case of acnd 24. to engagethe shaft 1 and having a cidentto any of the gears 16, 17 or worm 20, to operate the shaft 1 to raise or lower the caifold, a dog 26, Figs. 1, 2, on the plate 27, secured to the bar 7, serving to lock the gear 28 onthe shaft in desired, position.

The :handle 23. is preferably removable and appliedto the shaft 11 only when re uired.

port is. asv follows:v

', The operation ofmy novel scaflol sup- The cables 11 having been made fast to the outrigger 12, the support isl'owered by .the cables to the ground, the planks 5 placed on the bars 4 and the scaffold raised to a level-withthe work.., As the work proceeds, the s caifoldis raised as desired from time 105 0 time bymeans of the handle 21 and gears.

this period the supplementary cables Y 16, 17 and worth 20, as described. Duririi are. detached from the, pulleys 13. -Wh

up and out of the way proaches closely the outrigger 12, and the limit of travel, the cables is are secured to the pulleys 13, by any convenient means, as

by inserting the cablesthrough holes in the pulley walls and securing a block on the cable end. and the cables 1% will thus wind up on the pulleys 13 a little faster than cables 11 will wind up on pulleys 9, when the latter are rotated, as the pulleys 13 are larger in diameter than the pulleys 9'. Hence, by the time the roof 8 of the scaffold reachesthe bar 12, the limit of travel, the floor 5 will have been raised'materially rela: tive to the roof 8 so that the workmen can work at a higher level than wouldotherwise be thecase, and obtain longer effective use of the scaffold floor.

Scaffolds of tiis general type now in'use have'their raising and lowering devices at I thefloorlevel, substantially, thus being near the. feet of the worl men, and in the way, and therefore dangerous to their safety; while in my novel construction the raising and lowering devices or controls are well of the workmen, over their, heads, so that they cannot trip over them, and the floor space is all available. The controls are carried by the shaft 1 and are simple in construction. Furthermore, the supplementary raising and lowering device permitsv an adjustment of the scaffold floor that is new and very valuable from the time saving point of view, and that of convenience. Of course the roof 8 may alsobe used as a floor if desired, by movingthe material and tools-up there.

In Fig. 5 I have shown'a modified form of pulley or drumfor the supplementary ad justment.

In this case the, pulley 9 is provided on its outer face with lugs and the adjusting pulley 13 is provided on its adjacent face -with cooperating lugs 31..

Between the two pulleys on the shaft 1 is a pulley or clutchreleasing spring 32. acting normally toseparate the two pulleys. Near the end oftheshaft which, in each case, is threaded, there is provided a large nut 33 which, when it isturned up will throw the'pulley 13 against the pulley 9 causing. the lugs 30 thereonto lock with'the lugs. 31 and, therefore, when the pulley 9 is rotated, thus raise the floor 5 relative to the shaft 1,.as already described, Of course unscrewing the nut 33 1 will release the pulley 13 from pulley 9 and permit the cable 14: to unwind and the floor to descend.

In this form of construction also the scaffolds are shown in tandem formation, one above the other, as many being used as needed, the second and each subsequent scaffoldcable 11 being shown as suspended from a supporting chain 34, made fastto the outrigger 12 and running through the floors of each scaffold to the ground.

In this case too there may be a floor suspending cable 35 from each floor 5 to the anchor chain 34 corresponding to the cable 3 in the construction shown in Fig. 1.

The shaft 1 and its gears are in each case provided as in Fig. 1, and shown in dotted lines in Fig. 5 for convenience. At the end of each shaft 1-, or adjacent the pulley 13, Fig. 5, are two collars 36, 37, secured to. the shaft, and between them is secured in each case the. bar 6, which carries the roof beam 7 and the rail supports or eyes 38. for the rail 39. The bar 6 above the snaft is preferably made in two parts for convenience, the'lower end'of the upper section being provided with a socket a0 to receive the upper end of the lower section, making the rail supporta-bove the shaft 1 removable when desired. 7

This invention is not restricted to the particular embodiment thereof described and illustrated herein, and I claim:

1. A .1novable scaffold support comprising a shaft, fa pulleythereon with a shaft supporting main cable for attachment to any suitable outrigger, a floor, and its support suspended from the shaft, a supplementary floor adjusting pulley on the shaft with 21 ca le secured to the floor and operative with the main cable to effect supplementary floor adjustment and operative con trol for the shaft of the overhead type;

QQA movable scaffold support comprising a shaft, a pulley thereon with a shaft'supporting main cable for attachment to any suitable, outrigger, afloor and its support suspended from the shaft, a supplementary floor adjusting'pulley on the shaft with a cable secured to the floor and operative with the main cable to effect supplementary floor adjustment, and [operative control for the shaft carriedby the shaft.

3. A movable scaffold support comprising a shaft, apulley thereon with a shaft supporting main cable for attachment to any suitable"outrigger, a floor and its support suspended from the shaft, a supplementary floor adjusting pulley on the shaft with a cable secured to thefioor and operative with the main cable to effect supplementary floor adjustment, and operative control for the shaft carried by the shaft, and comprising a gear thereon, a frame, a pinion thereon, and a worm cooperating with the gear.

4. A movable scaffold support comprising adjustment, and operative control for the shaftcarried by the shaft and comprising a gear thereon, a frame, apini'on thereon, a worm cooperating with the gear, and a roof and hand rail support carried by the.

shaft. I I

.5. A movable scaffold support comprising a shaft, a pulley thereon with a shaft supporting main cable for attachment to any suitable outrigger, a floor and its support? ing member suspended from the outrigger, means to suspend the floor therefrom, a supplementary floor adjusting pulley on the shaft with a cable secured to the floor, means for locking the last mentioned pulley to the plementary floor adjusting pulley on the shaft larger than the first mentioned pulley and with a cable secured to the floor and operative with the main cable to effect supplementary floor adjustment simultaneously with the main cable ad ustment, and operative control for the shafts.

7.'A movable scaffold construction comprising an outrigger, a plurality of permanent scaffold suspending members thereon, a

plurality of movable scaffoldsupports comprisin each a shaft, a pulley thereon with a shaft supporting main cable for attachment to any permanent support; a floor and support vtherefor suspended from the permanent scaffold suspending member, a floor support suspended from the shaft and a supplementary floor adjusting pulley on the shaft with a cable secured to the'floor and operative with the main cable to effect floor adjustment simultaneously, with the main cable adjustment and operative control for the shaft. i i

8. Amovable scaffold support comprising a shaft 1, a vpulley 9 thereon with a shaft supporting main cable 11 for attachment to an outrigger; a permanentfioor support 8 and floor suspended from the shaft; a supplementary floor adjusting pulley 13 on the shaft, with a cable 14 secured to the floor and 3 having limited cooperating action to adjust the floor 5 relative to the shaft 1 while both are being'adjusted relative to the outrigger; and a gear operated control device near the center of the shaft, and a ratchet operated control'device near its end.

In testimony whereof, I have signed my name to this specification.

MICHAEL POWERS, 

